题目

定义在R上的函数满足：是的导函数，则不等式（其中e为自然对数的底数）的解集为(      ) A.                       B.      C.              D. 答案： AIf city noises ___ from increasing, people ___ shout to be heard even at diner.A．do not keep; will have toB．are not kept; haveC．are not kept; will have toD．do not keep; have to